AP BIOLOGY

Detailed explanation-1: -The light reaction is the first stage of the photosynthesis process in which solar energy is converted into chemical energy in the form of ATP and NADPH. The three products of the light reaction of photosynthesis are ATP, NADPH, and O2.

Detailed explanation-2: -Photosystem I (PSI) is also capable of absorbing light energy. Electrons from its reaction center pigment P700 are transferred to the protein ferredoxin, which can then donate the electrons to the electron carrier NADP+ to form NADPH or to the electron transport chain resulting in the production of additional ATP.

Detailed explanation-3: -Light energy is used by photosynthetic organisms (photoautotrophs) to produce both ATP and reduced electron carrier (NADPH). ATP, NADPH, and O2 are the three products of photosynthesis’ light reaction.

Detailed explanation-4: -The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.